Fix for Issue 73274: Printing causes view to scroll

chrome/renderer/print_web_view_helper.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/print_web_view_helper.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "base/process_util.h"
@@ skipping 53 matching lines @@
 
   // Layout page according to printer page size. Since WebKit shrinks the
   // size of the page automatically (from 125% to 200%) we trick it to
   // think the page is 125% larger so the size of the page is correct for
   // minimum (default) scaling.
   // This is important for sites that try to fill the page.
   gfx::Size print_layout_size(print_canvas_size_);
   print_layout_size.set_height(static_cast<int>(
       static_cast<double>(print_layout_size.height()) * 1.25));
 
+  if (WebFrame* web_frame = web_view_->mainFrame())
+    prev_scroll_offset_ = web_frame->scrollOffset();
   prev_view_size_ = web_view->size();
 
   web_view->resize(print_layout_size);
 
   WebNode node_to_print;
   if (node)
     node_to_print = *node;
   expected_pages_count_ = frame->printBegin(
       print_canvas_size_, node_to_print, static_cast<int>(print_params.dpi),
       &use_browser_overlays_);
 }
 
 PrepareFrameAndViewForPrint::~PrepareFrameAndViewForPrint() {
   frame_->printEnd();
   web_view_->resize(prev_view_size_);
+  if (WebFrame* web_frame = web_view_->mainFrame())
+    web_frame->setScrollOffset(prev_scroll_offset_);
 }
 
 
 PrintWebViewHelper::PrintWebViewHelper(RenderView* render_view)
     : RenderViewObserver(render_view),
       print_web_view_(NULL),
       user_cancelled_scripted_print_count_(0),
       is_preview_(false) {}
 
 PrintWebViewHelper::~PrintWebViewHelper() {}
@@ skipping 478 matching lines @@
         shared_buf.GiveToProcess(base::GetCurrentProcessHandle(),
                                  shared_mem_handle);
         return true;
       }
     }
   }
   NOTREACHED();
   return false;
 }
 #endif